EP 0663511 A2 19950719 - Logging while drilling method and apparatus for measuring formation characteristics as a function of angular position within a borehole.
Title (en)
Logging while drilling method and apparatus for measuring formation characteristics as a function of angular position within a borehole.
Title (de)
Verfahren zum Bohrlochmessen während des Bohrens und Vorrichtung zum Messen von Formationseigenschaften in Abhängigkeit von der Winkelposition in einem Bohrloch.
Title (fr)
Méthode de mesure pendant le forage et appareil pour mesurer des caractéristiques de formation en fonction de la position angulaire dans un trou de forage.
Publication
Application
Priority
US 18308994 A 19940114
Abstract (en)
A method and apparatus for measuring formation characteristics as a function of angular distance segments about the borehole is disclosed. The measurement apparatus includes a logging while drilling tool which turns in the borehole while drilling. Such characteristics as bulk density, photoelectric effect (PEF), neutron porosity and ultrasonic standoff are all measured as a function of such angular distance segments where one of such segments is defined to include that portion of a "down" or earth's gravity vector which is in a radial cross sectional plane of the tool. The measurement is accomplished with either a generally cylindrical tool which generally touches a down or bottom portion of the borehole while the tool rotates in an inclined borehole or with a tool centered by stabilizer blades in the borehole. <IMAGE>
IPC 1-7
IPC 8 full level
E21B 47/024 (2006.01); E21B 47/08 (2006.01); G01V 11/00 (2006.01)
CPC (source: EP US)
E21B 47/024 (2013.01 - EP US); E21B 47/085 (2020.05 - EP US); G01V 11/00 (2013.01 - EP US)
Designated contracting state (EPC)
DE DK FR GB IT NL
DOCDB simple family (publication)
EP 0663511 A2 19950719; EP 0663511 A3 19950830; EP 0663511 B1 20020724; AU 682075 B2 19970918; AU 8176594 A 19950727; BR 9500092 A 19951219; DE 69527447 D1 20020829; NO 315388 B1 20030825; NO 944730 D0 19941207; NO 944730 L 19950717; US 5473158 A 19951205; US 5513528 A 19960507
DOCDB simple family (application)
EP 95300059 A 19950105; AU 8176594 A 19941229; BR 9500092 A 19950112; DE 69527447 T 19950105; NO 944730 A 19941207; US 18308994 A 19940114; US 40772595 A 19950320